Flora of North America species comparison

prostrate, decumbent, ascending, or erect, 2–28 cm, retrorsely hairy or pubescent.

decumbent, ascending, or erect, 3–12 cm, retrorsely hairy.

not leathery, glabrous, glabrate, scabrous, or pubescent, hairs pointed;

cauline (1 or)2–4 pairs, petiolate, (2–)4–47 × 0.5–8 mm, blade elliptic to obovate, oblanceolate, or linear, base tapered, apex acute to mucronate.

basal and cauline or mostly basal, not leathery, retrorsely hairy;

basal and proximal cauline short-petiolate or sessile, 7–35(–50) × 1–4 mm, blade oblanceolate to linear, base tapered, margins entire, apex obtuse to acute;

cauline 1–3 pairs, sessile, 12–30 × 1–4 mm, blade oblanceolate to oblong or linear, usually arcuate, base tapered, margins entire, apex acute.

continuous, ± secund, 1–8(–16) cm, axis retrorsely hairy, hairs pointed and, usually, sparsely glandular-pubescent, verticillasters (1 or)2–8, cymes 1–4-flowered, 1 or 2 per node;

proximal bracts oblanceolate to linear, 10–25 × 0.5–4 mm;

peduncles and pedicels ascending to erect, retrorsely hairy and, usually, sparsely glandular-pubescent.

interrupted to compact, cylindric, 1–6 cm, axis retrorsely hairy, verticillasters 1–6, cymes 1- or 2-flowered, 1 or 2 per node;

proximal bracts oblanceolate to lanceolate, 7–30 × 1–3 mm;

peduncles and pedicels retrorsely hairy and sparsely glandular-pubescent.

calyx lobes lanceolate, 4–7(–7.5) × 0.9–1.8(–2.2) mm, broadly scarious-margined, apex acuminate to caudate, retrorsely puberulent, hairs pointed, and sparsely glandular-pubescent;

corolla blue to violet or lavender, lined internally abaxially with violet or reddish purple nectar guides, funnelform, 14–20 mm, sparsely to densely yellow-lanate or yellow-pilose internally abaxially, tube 6–8 mm, throat gradually inflated, 6–8 mm diam., 2-ridged abaxially;

stamens: longer pair reaching orifice, filaments glabrous, pollen sacs opposite, navicular to subexplanate, 0.9–1.4 mm, sutures papillate;

staminode 11–14 mm, reaching orifice or exserted, flattened distally, 0.3–0.4 mm diam., tip straight to recurved, distal 7–10 mm densely pilose, hairs golden yellow, to 1 mm;

style 13–15 mm.

calyx lobes lanceolate, 4.5–7 × 1.5–2 mm, puberulent and glandular-pubescent;

corolla blue to violet, with reddish purple nectar guides, tubular-funnelform, 15–20(–23) mm, glabrous or sparsely white-lanate internally abaxially, tube 4–6 mm, throat gradually inflated, not constricted at orifice, 6–8 mm diam., rounded abaxially;

stamens included, pollen sacs opposite, navicular, 0.9–1.2 mm, dehiscing completely, sutures papillate;

staminode 9–12 mm, included, 0.5–0.6 mm diam., tip recurved, distal 6–8 mm sparsely pilose, hairs yellow, to 0.5 mm;

style 9–11 mm.

7–8 × 3.5–4.5 mm.

4–7 × 3.5–5.5 mm.